Winding machine



Feb. 20, 1951 J. E. BOSH ET AL WINDING MACHINE Filed May 51, 1946 9 sheets-sheet 1 INVENTORS JAMES E. 505/7 P575? AAfX BY Feb. 20, 1951 .1. E. BOSH ET AL. 5 1

WINDING MACHINE Filed May 31, 1946 a Sheets-Sheet 2 INVENTORS JAMES 505/) ATTORNEY Feb. 20, 1951 Filed May'Sl, 1946 J. E. BOSH ETAL WINDING MACHINE 9 Sheets- Sheet s Y PETE/P AZEX Feb. 20, 1951 BQSH ETAL 2,542,303

WINDING MACHINE Filed May 31, 1946 9 Sheets-:Sheet 4 Feb. 20, 1951 J, gos ET AL 2,542,303

WINDING MACHINE Filed May 31, 1946 .9 Sheets-Sheet 5 IN VE N TORS JAMES E 5097/ PET .7? Alf X AT TORNE Y Febf20, 1951 J. E. BosH ET AL WINDING MACHINE 9 Sheets-Sheet '1? Filed May 31, 1946 IN VEN roRs JAM; f. 5057/ Fifi)? flZfX A T ram): v

Feb. 20, 1951 J. E- BOSH ETAL WINDING MACHINE 9 Sheets-Sheet 8 Filed May 31, 1946 irro/e/ver Feb. 20, 1951 Filed May 31, 1946 J. E. BOSH ET AL WINDING MACHINE 9 Sheets-Sheet 9 INVENTORS JA/VEJ E. 505/2 Y P5756 ALEX ATTORNEY Patented Feb. 20, 1951 2,542,303 WINDING MACHINE.

James E. .Bosh fierwyn, and Peter Alex, Chicago, 111., assi -nors tolicllogg Switchboard and Supply Company .Chicago, 111., a corporation of Illinois Application May 31, 1946,Serial No. 673,428 31 class. (01. 242- This invention relates to improvements in winding machines, and has particular reference to machines for insertinginsulatiommaterial or separation layers in layer wound coils.

In the manufacture of layer wound coils it is the practice to employ automatic machinery which will wind a layer of strand or wire upon a mandrel or an arbor and then cause at proper intervals a layer of sheet or insulating material to be inserted between successiv .layers wound on the same arbor. Such automatic machinery is generally provided with means for feeding the sheet material, means for. measuring the sheet in accordance with increasing diameter of the coil being wound, means for severing the measuring sheet, and means for insertin or delivering the measured and severed sheet to the winding at proper intervals. a

The use of very thin sheetmaterial for insulation, in order to obtain coils having goodrmagnetic properties consistent with a minimum amount of space, has presented difficulties in handling not found in other sheet insulating material. Very thin sheet material, such as cellulose acetate having thicknesses ranging from 0.0005" to 0.001" have been unusually hard to handle. One of the main reasons underlying this difiiculty has been the failure of the machines of the 'prior art to release the measured and severed sheet'in the sheet serving operation just prior to the .engagement thereof by the .coil as it'is being wound.

Another difficulty attendant upon the machines of the art has been the failure to support thin sheets adequately throughout both their length andwiclth, both kinds of support being necessary both during the severing operation and the serving operation.

In the winding of coils it is' obvious that the diameter thereof is increasing at intervals during the winding operation, and this requires that the sheet serving mechanism be suitably varying in its movement to take care of such increments in diameter, or else the serving mechanism will not function properly with the wi'ndingoperation.

In the winding of coils the changesin' diameter vary as the thickness of the strand to be wound and also as the thickness of the sheet material separating each layer. In the machines of the prior art it has heenthe practice to'raise the sheet serving mechanism to allow for the increasing diameter between each sheet serving cycle, but it has not been possible heretofore readily to change the sheet serving mechanism to allow for differences in both wire or s rand size norfor the thickness of the sheet material.

With the foregoing considerations in mind it is an object of this invention to provide a wind- -ing-machine having a sheet measuring and a sheet serving mechanism -which can be used with ex tremely thin materials.

Another ob ject is to provide in a winding machine means for supporting sheet material during both the sheet severing and the sheet serving operations.

Ayet further objectis to provide means for varying the movement of the sheet serving mechanism in accordance with the increase in diameter of a coil being wound.

stillanotherobjeot is to provide in a winding machine of the v class described means for readily adjusting the :sheet serving mechanism in order that the machine may readilybe accommodated to'ihe. winding of coils of a diiferent diameter, different "wire sizes, and different thicknesses of sheet insulating material, and combinations of two :or more of the foregoing variables.

Further objects of the invention are set forth in the followingspecificafion which describes a preferred embodiment of the invention, by way of example as illustrated by the accompanying drawings, in which:

Figure 1 is a side elevation of a portion of a winding machine, showing the sheet serving means thereof partly in section and illustrating the drawing-off, .feed'ng and cutting mechanisms for the sheet material, and showing the positions of thecorrelated elements thereof during the delivery of the paper to the winding;

Figure '2 is alpart sectional View similar to Figure 1 showing the position of the feed rolls immediatelyfollowing'the' feeding of the sheet material into thedelivery shelf. and illustrating the mannerin which the feed rolls are separated to permit the measuring bar to draw an additional length of paper therebetween;

Figure .3 is a similar part sectional View showing the cutting-off mechanism which operates to sever the stripof' paperimmediately following the measuring operation;

" Figure 4is' apart sectional view showing the sheet serving rmechanisinwith means for varying the movement thereof in accordance with the increase in' diameter of the coil 'being wound;

Figure :5 is asimilar part sectional view of the sheet serving mechanism showing the position ofthe' feed elevatingmeans at the start of the winding 'ofthe coils;

Figure 6 is asim-ilarpart sectional View illustrating the sheet measuring means for controlling the length of 'the sheet "fed into'lthe coils;

Figure '7 is an enlarged detail view of a portion operative position during the transfer of the sheet to the coils being wound;

Figure 10 is a side View of the elevation control mechanism shown in the opposite position shown in Figure 9;

Figure 11 is an end view of the sheet serving mechanism shown in position to effect delivery of the sheet to the coils, the sheet releasing means being shown in co-operation with the sheet serving means;

Figure 12 is a, detailed plan view of the cam shaft and various cams and levers for actuating the difierent mechanisms; and

Figure 13 is a detailed front View of the sheet serving means, the sheet releasing means and the cutting-off mechanism.

For convenienceof description the invention will be described by dividing the complete machine in convenient units, such as the coil winding mechanism in general, means, strip or sheet feeding mechanism, sheet measuring means, sheet serving means, and means for controlling the sheet serving means.

Referring now particularly to Figures 4, 5 and 9, the machine to which the present invention is applied is substantially of the character disclosed in Le Boeuf Patent No. 2,029,577, Machine for Winding Electrical Coils, issued February 4, 1936, and comprises a bed or table 2 supported by legs 3 adapted to rest on the floor.

The table 2 supports a headstock t which carries the journals for a winding spindle, not shown, which supports a mandrel or arbor 5 having thereon a tube 13 around which is wound a coil C, suitable means not shown, being provided to drive the arbor 5 to wind the coil C. A supply of strand material or wire w passes over a wire guide 8, 8 supported on a reciprocating crosshead 9, the reciprocation of the crosshead 9 being longitudinal of the axis of the arbor 5 to provide during the reciprocation thereof and the rotation of the mandrel 5, a coil upon the man-' drel 5. It is obvious that a plurality of guides 8, 8 maybe provided on the crosshead ii whereby a plurality of coils may be wound simultaneously.

The complete mechanism for inserting sheets of insulating material into the coil or coils being wound comprises a complete unit adapted for attachment to the rearward side of the coil winding machine. Referring particularly to Figures 1, 4, 5 and 9, the mechanism is supported on a pair of frame members or brackets l9 and H which are bolted to the table or bed 2 by means of cap bolts l2 threaded into the table 2. The frame members Ill and II furnish supports or bearings for the various shafts of the mechanism later to be described. Extending between the frame members ill and H at their upward rearward end is a strut or tie rod E 3 which is secured to the members It) and ll by means of cap bolts lSa which pass through holes in the members it and l and are threaded into the strut or tie rod l3. Referring particu arly to Figures 1, 2, 3, 5 and 9, the frame members l0 and H are also braced at their forward end by means of a strut the sheet supply or paper guide member i l, the latter being se cured between the members It and H by means of cap bolts l5 passing through holes in the frames I0 and ii and threaded into the'strut I4.

As previously stated, and with particular reference to Figure l2, the frame members iii and il constitute bearings for various shafts of the mechanism, and as herein shown, provides bearings or journals ll and I8 for a rotatable cam shaft I9 which provides the main driving element for the several mechanisms hereinbefore referred to, and which is driven by the same mechanism which drives the arbor 5 through a train of gearing, not shown. The details of the gearing which drives both the cam shaft l9 and the winding mandrel or arbor 5 is described with de tail in Le Boeuf Patent No. 2,029,577 referred to hereinbefore. Sufiice it to say, however, the cam shaft 19 makes one complete revolution during the complete traverse of the carriage or cross-- head 9 in either direction.

Means are provided for supplying a sheet of insulating material to be inserted into the coil C at. proper intervals, and to this end, as seen with reference to Figure l, a roll R. of sheet cellulose acetate or other insulating material is rotatably mounted on a rod 2E3 removably supported on the frames it and H. As is shown, the central tube '1 upon which the sheet mateial 'is rolled is preferably supported on each end by means of a pair of frusto-conically shaped members 2i which may be suitably positioned with the roll R and thereafter locked into place upon the rod 23 by means of set screws 22. The rod 29 may have provided at each end thereof for proper longitudinal positioning thereof a collar 23 which may be locked into place by set screws 26;

The end of the paper strip S is drawn from the roll R and passed around movable rollers 25, and thence up and over the tie rod it. The strip'is then drawn over a plate-like shelf 28 which spans the frame members it and i l and is fastened thereto in any convenient manner. Preferably, the plate 26 has end portions 2? bent downward at right angles to provide smooth corners so that the sheet material may not be torn or otherwise damaged during its travel thereacross. From the plate or shelf 2%; the paper passes between a pair of feed rollers 28 and 29 which feed the paper on to a delivery shelf or sheet serving means indicated generally by the ordinal 3G in a manner as will be later explained.

Means are provided for drawing a portion of sheet material from the roll R during a part of the cycle of operations of the machine, and to this end, see Figures 1 and 12, the rollers 25 are rotatably mounted on a rod 3! secured to the end of a roclzable supply lever 32 which is pivoted upon a red 33 extending between the side frames ill and l! and secured at each end in bosses located at each frame by means of pins 35, see Figure 12. A cam follower 35 projecting from the supply lever 32 and secured'thereto by means of a pin 36 is adapted to co-operate with a earn 3'! fast with the cam shaft ill. The supply lever with its cam follower 35 is constantly urged into contact with the cam 31 by means of a helical spring 38 around the rod 33, one end of which is secured to the lever 32, the other end being secured to a collar 39 fastened to the rod 33. The spring 38 also serves to'make the lever 32 abut a collar an secured to the rod 33.

."The supply control cam 31 and the lever 33' actuated thereby :is shown-by therinitial position in Figure 1; with the partsin this relationship the rollers are depressed to approximately of a-complete working stroke. During this stroke thero llers 25.-engage the loop of sheet material S and move downwardly to draw a length of sheet materialfrom the roll B. When the arm .32. isin its lowermost position as illustrated bythe dotted line Figure l the loop of sheet material is .completely formed, and further .rotativemovement of the cam 3? permits the follower and the lever 32 to move upwardly to their uppermost inoperative position as indicated by the dashlines in'this view. While in this. position the loop of paper S is free to be drawn upwardly by the feed rolls 28 3116.25] in the manneruas later explained. Inorder to provide a small amount of tension of the suspended length of sheet material a weight ii in the form of a cylindrical rod may be placed within the loop.

"Means are prbeing drawn r the :str-ut i3, and to this end, and mounted. upon the-strut liar-e a pair of weighted .grippers in theformof discs t mounted ecoentrlcally upon 3' arms i? which may be loosened and adjusted along the strut Preferably the peripheries of the disc di are provided with rubber .or other friction material to provide frictional resistance to the paper strip passing thereunder. The arms ifi together with thediscs Gimay be adjusted imposition-alon the strut for proper relationship with sheet material of difierent widths.

As has been described generally, the strip S is movedacross the table fifito be moved into proper position with the sheet serving means Bil, the sheet measuring means and the sheet severing means, and comprises impart the pair of opposed rollers 28 and 29. Referring particularly to Figures 1, '7 and 8, said means comprises a cam Mi 'fast upon the shaft 1' 9 and deriving its motion therefrom, which .co-operates with a cam follower secured to an arm 45 which is pivotably connected to a. ful rum rod i! which spans the frame members. and i i and is journaled, therein. Thesubstantial translative movement of the cam followerdd causes the rollers 28 and, 29 to be rotated, and as will be seen from Figure 2, the camfollower 5-5 co-operates with a slotted arm 8 pivoted on a stud iii supported'by the frame it] which also supports a gear iii The slotted arm 28 carries atthe end theerof a pawl 5i i pivoted'at 52 and adapted to engage with the teeth ofthe gear iii}. A sprin 53 maintains the end of the pawl 55 in engagement with the teeth with the gearfiii, one end of the spring 53 being hooked to the pawl 52 and the other end being hooked to the arm 48. The gear 5% cooperates with an idler gear 5 t journaled on a stud 55 in the frame i ii and the idler gear meshes with gearfitdriving roller 28, gear 55 in turn meshing with gear 5'! to drive roller i Rollerit together with its driving gear lit is suitably journal-ed in frame members it and ii.

Means are provided for permitting the top roller 23 to be swung out of contact-with the lower roller when it is desired to feed an additional length of sheet material to the sheet serving means. To this end the upper roller 29 and its driving gear 571 are supported on an arm 58 fast upon a shaft to, which is iournaled in a bearing 5i) mounted on frame members i!) and II. One of the arms; see Figure 2, is provided with an upstanding lug 6! through wh ch is threaded anadjustable limiting screw 62. A lifter 6, lever 63.pivoted..o11. the shaft .59 is formedx'with a lug 64 adaptedto .engage the end of the screw 62 to rock the arm 58 to .raisethe top roller .29 away from the lower roller 26 upon rotation of the cam 44, which through the cam follower 45 imparts rotation to the arm 38 to cause an angular shoulder 55110 rock the arm 63 about shoulder 59, arm .63 having an adjustable connection to the angular shoulder'fiii by means of the threaded member The end B7 of the arm 63 normally rests against thehub of the arm 48 when the connection ii? is out of contact with the angular shoulder 65, and the arm 58 is normally biased in a direction whereby the roll as makes contact with the roll-23 by means of a coil spring 88. A spring 69 .is provided to tend to swing the arm iii downwardly to maintain the cam follower 55 in contact with the cam one end of the spring 69 being anchored at the pivot 52, the other end being anchored at the frame it at i ii, see Figure l. i Means are provided for measuring the sheet material which has previously been moved into the sheetserving means by the action of the feed rollers 28 and 251, the sheet measuring means heingalso operable to maintain the sheet serving means in sheet receiving position, at the same time the sheet measuring means pl'OVidiIlg for support both longitudinally and transversely of the sheet material, and the *sheet. measuring means thereafter moving to maintain the sheet serving means in sheet holding position forosub sequent severing of" the .sheettmaterial prior to the sheet serving operation. As will be seen with reference to Figures 3, 6, 7, 8 and 12, the sheet measuring meanscomprises. a horizontally extending bar or rod 853 which is positioned forward of the paper-guide or strut it. The length of the loop is governedby the circumference of the coil or coils being wound at the time the sheet is to be served thereto. As the circumference of the coil constantly increases in length with the growth of the i winding, the length of the insulation strip must increaseaccordingly.

Referring particularly to Figure 6, the measuring barilfi is formed integrally with legs 8i having laterally extending feet 82 which are secured to a pair of measuring levers 83 which are each pivoted on frames iii and Ii at M. The levertfi has a rea-rwardly extending portion 85, hingedly connected to a lever-85 pivoted upon fulcrum rod 41 by means of an adjustable connector 81. Means are provided for rocking the lever 86 about its axis t? to cause the downward or measuring movement of the measuring barfii at proper intervals, and to this end the lever'tii has mounted at the other end thereof a, cam follower $33 which at times isin contact with a cam 89 fast upon cam shaft it. Since the amount of downward movement of the cam follower 38 determines the amount of downward movement of the measuring bar- 89, means must be provided to limit such downward movement in accordance with the length of the sheet to be measured, sever d and later served. 'Io this the cam follower S8 is supported on a pin N9, the extension of which is caused to rest against a stop or gauge finger 90 mounted upon a gauge bar ill which is provided at one end with a rack 92 which meshes with a pinion 93 fast upon a shaft 9 A spring 52E- connected at one end to the lever 33 and to the other end on the frame iii causes the extension normally to rest on the stop 2%. The gauge bar 93 may be conveniently supported by guides 234-, see Figures 5 and 12, secured to the frame l l. The pinion E3 is periodically rotated a small amount to lower the rack 'shown. The upper edge of the blade 7 ill with the gauge finger 90 to cause the measurin bar 80 to be lowered in an increasing amount, and as will be seen with reference to Figures 9, 10, the shaft 33 projects beyond the frame member I I and carries adjacent its bearing in the frame I la spur gear 35 secured thereto. 1 Means are provided for driving the spur gear 95 intermittently with its attendant pinion 93', see Figure 6, and as shown with particular reference to Figure 10, the cam shaft Is has mounted thereon an adjustable cam 33 consisting of an annulus 91, a hub 98, and a slidably adjustable cam block 99 mounted therebetween. The annulus 9'! surrounds the end of the cam shaft I9 abutting the side of a bearing on the frame I' I and is provided with a diametrically extending slot I30 in its face. The slot I extends only part way across the amiulus so that provision is made for a radial set screw I 0i at one end thereof. The cam block 99 is adapted to be slid radially in the slot I30 of the annulus 9'! whereby its pointed end I62 may be projected beyond the periphery of the annulus 9?. The block 99 has a slot I553 through which the shaft I9 extends to provide for this adjustment. A pair of bolts I M are provided to draw the annulus 9'! and the hub 98 together, and the block 39 will be securely clamped therebetw'een in its adjusted position.

The cam 96 co-operates with a lever I pivoted 'on the fulcrum shaft 41, the lever I05 having thereon a cam follower I06 carried on a pin I01. The lever I35 has mounted thereon a pawl I08 which is pivoted to the lever at I03, the pawl I98 has mounted thereon a pawl I08 which is pivoted to the lever at I09, the pawl I08 being lightly biased to engage the teeth of a spur gear I I0 by means of a spring III which is hooked at I I2 to the free end of the pawl and at its other end to a pin H3 on the free end of the lever I05.

It will thus be seen that the rotation of the cam 98 upon the shaft I9 will give intermittent rotation to the spur gear H0 which has fast thereto a small spur H4, spur gears H0 and H4 being mounted upon a stub shaft H5 secured in the frame II and provided with a head as at H6. The small spur gear H4 meshes with the spur gear 95 fast on the shaft 93.

It will thus be seen that as the pinion 94 on the shaft 93 is intermittently rotated a small amount the gauge bar 9I will be lowered a corresponding amount thereby lowering the gauge finger 93, and the measuring bar 80 to increase the downward movement of measuring bar 80 in accordance with coils of increasing diameter.

Means are provided for cutting the sheet material to form a sheet of proper dimensions for insertion between the layers of the winding,

said means comprising a pair of knives one stationary and the other movable. Referring particularly to Figures 1, 7, 8 and 9, the forward side of the paper guide member or strut I4 is recessed along it length to receive a lower or stationary knife'blade I which is fastened against the strut I4 by a plurality of screws, not I 30 is beveled to provide a shearing edge forming a continuation of the upper inclined surface of the paper guide or strut I4. An upper or movable knife blade I3 I, which co-operates with the lower or stationary knife blade IE0, is pivotally mounted between the forward end of a pair of arms or levers see Figure l, provided with a lower inclined edge. The arms I32 are pivoted upon a shaft I33, the shaft I33 being supported in hubs or bearings at the top of the 8 frame members. I0 and II. Referring now to Figure 13 the forward end of the levers I32 are provided with hubs I34 for receiving the reduced cylindrical ends or trunnions I35 of a knife supporting bar I35. The bar I36 is of rectangular cross section and the blade I3I is secured to its flat forward face by means of suitable screws as shown. The knife I3I moves in an arcuate path and it is necessary that its cutting edge be maintained in contact with the sharpened edge of the lower knife I30. For this purpose the left hand trunnion I35 is extended beyond its bearing I34 and at its extremity is a fixed collar I3I acted upon by a spring I38, which is coiled around the trunnion I35 between the collar I3! and the bearing I34 with its ends secured to each of these elements, whereby the bar I36 tends to be rocked in a direction to maintain the lower inclined cutting edge of knife I3I in contact with the lower knife I30.

Referrin to Figures '7 and 8 the knife I3I is arranged to slide downwardly between the knife I30 anda sheet guide plate I39 secured to the forward face of the paper guide or strut I4. The guide plate I39 supports the paper strip in advance of the fixed knife I30, and the paper strip is further supported in advance of the fixed knife I3I] during times when the sheet is fed into the serving means 38, when the measuring bar 80 is in its uppermost position, by means of a small angle I40 which is supported at its ends on the legs ill in any convenient manner. It will thus be seen that the sheet material is supported at a plurality of points when it is fed into the sheet serving means indicated generally by the ordinal 30.

Means are provided for moving the knife I3I downwardly in the sheet serving operation during a portion of the cycle, and to this end, as shown in Figures 1 and 3, the arms I32 which support the upper movable blade I3I are caused to pivot about the axis I33 by means of a cam I secured to the main cam shaft I9, cam I50 bein in contact with a cam follower roll I5Ia mounted at one end of a knife operating lever I5I pivoted upon fulcrum rod 4?, the other end of the lever I5I being hingedly connected to a rod or link I52 at I53. The'other end of the rod I52 is hingedly connected at I54 to the knife op-' erating lever I32. A'spring I55 constantly urges the cam follower I5Ia into contact with the cam I50, said spring being secured at one end to the lever I5I, and secured at the other end to the shaft 84. Referring now to Figure. l, the cam follower I5Ia is shown in its lowermost position with the rearward end of the lever I5I rocked upwardly and the arms I32 supporting the upper knife I3I in elevated position. As the cam I56 rotates substantially one hundred and eighty degrees its eccentric contour forces the follower I5Ia upwardly and the rearward arm of the lever I5I is rocked downwardly against the action of the spring I55. During this movement of the lever I5I the arms I32 are lowered to carry the upper knife I3 I downwardly across the fixed knife I30 in a manner as later more fully explained. However, the strip severing operation takes place immediately following the measuring operation, and the inclined cutting edge of the knife I 3I makes contact with the cutting edge of the lower knife -I3Q and cuts the strip S with a'shearing action to provide a sheet of predetermined size which is held in and transferred to the coil or coils being wound by the operation of the sheet servin means 30 next to be. described.

. serving means (it Means are provided for securely holding the sheet material after the sheet has been fed thereto during the sheet feeding operation, the sheet being held during the measuring and severing operation, and the sheet serving means being thereafter erated to serve the measured and severed sheet and to release the measured and severed sheet just prior to the engagement thereof by the coil or coils being wound. The sheet serving means 36 is positioned in front of the knives and the measuring bar 39, and as shown with particular reference to Figures l, 5, 9 and 13, the sheet serving means comprises a horizontally extending angle iron rest or platen I58 supported at its endsby elbow shaped levers Iii! and IE2 which have their hubs fixedly se cured to a horizontal shaft I63 extending between the forward ends of a pair of relatively long arms N34. The arms 564 are fast on a shaft IE5 which is journaled inthe frame members It and ii, the shaft it-rbeing adapted to be rotated in its bearings by elevating means as later described, whereby the sheet serving means as is lifted to the height necessary for effecting delivery of the measured and severed sheet in proper relation or position to the periphery of'the coil being wound, the lifting of the sheet servinganeans 3d at the same time causing varying movement of the sheet serving operation thereof in accordance'with the distancefrom the center of rotation ofthe coil being wound to the periphery of the coil being wound.

During the inoperative stroke of the elevating means the ends of the arms it l rest upon the top of the bed "2 of the winding machine as shown in Figures 2, .3 and i. Secured in the bosses at the ends of the arms its are bolts H5501. arranged with their heads adapted torest-on the top of the bed the bolts 35a being adapted to be adjusted. to regulate the lowermost position of the arms its whereby the initial position of the sheet serving means 39 with respect to the coil or coils being wound may be adjusted. The sheet is normally maintained in close proximity with the. measuring'bar 89 by means later to be described. To limit the rearward movement of the said serving means or shelf 3i], lugs I623 are provided on the sides of the levers i6! and W2 and are adapted to bear against the finished faces lt'ionthe frames iii and I I, see Figure 9.

As shown in Figures 7, 8 and 13,-the levers lfii and i 2 have inwardly projecting ledges I59 to which an; angularly shapedrest or platen I!!! is secured. Rising from the top of the ledges I59 are a pair of guide pins IlI uponwhich a tension plate I??? is adapted-to slide when the sheet'material to be inserted into the delivery shelf tilduring the sheet feeding operation, and when the delivery shelf 38 "is movingunto the sheet serving position. The guide pins ll! shouldered and the shoulders thereon bear against platen its, the end of the pin ill being threaded and securing the platen H0 to-the ledges by means'oi nuts i'i i threaded to the pins i? i, see Figure '13.

The tension plate I72; mounted to slide upon the upright pins ili' by means-of sleeves il l therearound, comprises a sheet metal strip with its rearward side iiared'upwardly. This flared portionof the tension plate H2 together with rearward rounded portion of the platen i'ifl provides a re-entrant opening or mouth for re ceiving the forward edge of the sheet as-it feeds from the rolls 28 and 29. I

Secured to the rearward side of the tension plate I12 are a pair of fingers H5 which are bent upwardly and rearwardly so that their ends are adapted to engage with the top of the measuring bar 89 as the latter is raised, to lift the tension plate I12 to permit the sheet to be fed thereunder, see Figure 7. The sheet is fed across the platen lit] by the feed rolls 28 and 29 and the measuring bar 88 then descends to perform the measuring operation by forming a loop in the sheet in the manner as previously described. To the end that the sheet is properly gripped on the delivery shelf til during the measuring operation to prevent retrogressive movement thereof, a pair of sheet metal fingers I16, see Figures '7 and 8, are attached to the forward side of the platen ilil and reach upwardly above the tension plate Ii2. The upper extremities of the fingers lit are formed into a loop to support a horizontal rod Ill which supports a plurality of gripper-fingers H8 which pass through an opening in the tension plate H2, and whichhave in the ends thereof a rubber detent i'IB for gripping the sheet material. The detent 579 may be retainedinside the finger its by means of a bolt I833. The platen Ilii is preferably covered with felt or similar material, which with therubber detent llil securely grips the sheet material. As shown with reference to Figures 7 and 8 when the delivery shelf 3!) is in position for the sheet feeding operation the tension plate Iii! is lifted by the action of the measuring bar til, at the same time lifting the finger I18 and the detents HQ out of cotnact with the platen lie, to permit the sheet material to be slid forwardly thereacross: With reference to Figure 8, when the measuringbar 8i? has moved downwardly to form a loop in the sheet material the tension plate I12 is in contact with the platen E78 and the fingers H8 are released whereby the detents I1 9 are in contact with the sheet material to prevent itsbeing drawn rearwardly by the action of the descending measuring bar 80.

As seen with reference to Figures 7, 8 and 13 the lower platen ilfl has secure-cl thereto, a plurality of thin flexible fingers itl' whichsupport the sheet material throughout its length while it is being retained in the sheet serving means 30, the fingers I3I insuring that the strand being wound on the coil form may evenly grip the forward end of the measured and severed sheet. The fingers I8! may be secured to the platen in any convenient manner as by the screws E62 shown in Figure 13.

The sheet material which has been measured and severed in the manner as previously explained is delivered into the coils for insertion between the layers thereof by a forward swinging of the sheet serving means or delivery shelf to the position shown in Figure 11. The forward projecting edge of the sheet is delivered to the upper surface of the coil being wound and is drawn thereinto by the strand or wire to. In order that the sheet may be fed to overlie the top of the coil as it increases in diameter it is ecessary that the delivery shelf 39 be progressively elevated during the progress of the winding. The elevating movement of the delivery shelf 39 must be in proportion to the diameter of the coil, its total extent being substantially equal to the thickness of a strand of wire plus that of the previously inserted sheet plus the di ameter of the coil being wound. In the use of extremely thin sheet materials between layers of strands in a coil, the gripping of the sheet 11 material between strands must be free and without any gripping action by the sheet serving means. To this end means must be provided for releasing the sheet held by the delivery shelf 35, just prior to its being gripped by the strand or strands being wound.

The elevating means for'the delivery shelf 30 and the control therefor is described with reference to Figures 4 and 5. The shaft I65 carrying the arms I64 has also fixed thereon a cam arm I08 provided with a cam face I9I which may be angularly adjusted in its position with reference to the arm I90, since one end of the cam face is pivoted at I92 and is provided with a slot I93 spaced from the pivot I82 so that the face may be rotated about the pivot I92 and secured into position by means of a bolt I94 threaded into the arm I90. A cam I95 fast upon the shaft I cooperates with a lifter member I96 having a cam follower It'l -secured thereto which follows the contour of the cam I95, the contour of the cam I95 being such that a substantially vertical reciprocating motion is given to the lifter member IQEB. The lifter member I86 is positioned against the side of the cam I95 and held against lateral displacement by means of a collar 232 fast on the cam shaft I9. The lifter member I96 is constantly urged into cantact with an elevation control cam Isa by means of a spring I9 secured at ii z'lto the lifter member I96, the other end of the spring I99 being connected to a member Zfil which may be pivotally adjusted about the rod 33 spanning the frame members Id and it. The upper end of the lifter member IQS is adapted to engage against the cam face IQI of the elevation arm I9 3 to rock its shaft I55 to raise the arms I65. In this manner the levers IEI and IE2 carrying the delivery shelf 3 3 are bodily raised to the.

position necessary to effect delivery of the sheet to the coils, see Figures 4 and 11. The forward edge of the lifter member I06 engages against the face of the elevation control cam I98 which is fast upon the shaft 93, previously described as carrying the pinion gear 94, see Figure 6.

At the start of the winding operation the coil C is relatively small in diameter and the elevation of the delivery shelf 30 is unnecessary to effect proper transfer of the sheet to the coils. Accordingly, the cam I58 is provided with a fiat face 203 along which the lifter I96 slides with the control cam I98 in the position shown in Figure 5. The lifter member I98 will be reciprocated substantially vertically by the rotating cam I95 with its upper end moving from the position shown by dash lines to that illustrated by the full lines. Under this action the lifter member I96 does not engage the cam face I9! with the arm I99 and consequently no elevation of the delivery shelf takes place.

However, as the coils start to build up, the control cam IE3 is slowly rotated in a clockwise direc tion as seen in Figure 5 and its eccentric contour gradually swings the lifter member I95 rear wardly'against the action of the spring I99. As the lifter member I36 continues to be reciprocated bythe cam I95 its upper end engages the cam face Isl on the member I93 to raise the latter and also the delivery shelf 3%. During a complete operation the control cam I98 is intermittently rotated to a slight extent and at each turning movement thereof it moves the lifter I95 longitudinally on the inclined cam face IQI of the arm I83, thereby causing the lifter ISIi to engage the cam face IIII at points progressively rearward 0n the cam face ISI.

As was described with particular reference to Figure 10 the cam shaft 53 was periodically rotated by a ratchet and pawl arrangement driven by a main cam shaft I9. When the machine is first placed into operation the control cam. I93 must be placed in the initial position seen in Figure 5 with its flat surface 2&3 in contact with the lifter member Hi6. At the same time the gauge finger 90, see Figure 6, must be raised to render the measuring bar 83 inoperative during the same portion of the operation of the entire mechanism. Referring particularly to Figure 10, the shaft 93 extends beyond the hub of the gear 95 and upon its end is an arm 2 I 0 secured thereto by a bolt 2| I passing through its split hub. The arm 2I0 carries'a pin or stud 2 I2, the inner end of which passes through an enlarged circular hole 2I3 of a crank handle 2E4. The crank handle 2M is loosely mounted on the shaft 93 between the arm ZIII and the hub of the gear the hub of the crank 2M being provided with a circumferential groove 2 I 5 engaged by an upper hooked end 216 of a pawl release rod ZII. T1 hook 2I6 of the rod 2 Il frictionally engages groove 2I5 to resist the turning movement of the rod 2 IT on the hub of the crank 2 I i.

The lower end of the rod 2 I? is positioned between the pin H3 projecting from the top of the pawl I08, and the pivot I09 of the pawl, and during the winding operation the rod ZII rests against the pivot I 09 as shown in Figure 10. The hub of the crank ZI4 has a spring, not shown, coiled about the hub thereof which tends to rotate the crank to hold the rod 2H in the position as above described. The turning movement of the crank 2E4 is limited by the pin 2I2 engaging the side of the enlarged hole ZIS therein.

After the completion of one or a series of coils the machine is adjusted for another winding op-' eration'by turning the crank 2H5 in a contraclockwise direction until it strikes the rearward edge of the bed 2, see Figure 9. At the first movement of the crank in this direction its hub is rotated on the shaft 93 against the tension of the spring around the hub of the crank 2M until the side of its hole 2I3 makes contact with the pin 2I2. During this initial movement of the crank, the rod 211 is rocked to cause its lower end to contact with pin II2 on the pawl I08 whereby the pin. is disengaged from the teeth of the ratchet wheel H0. Under this movement the rod ZI'I brings up the end of the follower pin I01 which serves as a stop therefor. After the pawl I08 has been released from the ratchet wheel H0, continued movement of the crank 2 I4 turns the arm 2I0, through the medium of the pin 2I2, thereby to rotate the shaft I33. The turning of the shaft 93 causes the gears 95 and H4 to return the ratchet wheel III! to its first or starting position. As the crank 25 strikes the bed 2 it is released by the operator and the spring around the hub of the crank then acts to turn it back slightly as limited by the engagement of the pin- ZIZ with the opposite side of the hole 2I3, at which juncture the lower end of the rod 2! I releases the pawl I08 to allow it again to engage the teeth of the ratchet wheel H0. By the foregoing operation, the shaft 93 is rotated until the stop or finger is raised to its uppermost position, and the cam I98 is rotated to the position shown in Figure 5, which positions of stop 90 and cam I98 is for the start of the coil winding operation.

Means are provided for effecting delivery by the sheet serving means of a measured and severed essence sheet. to the coil or coils being wound, .andi-tothis end the levers it! and. IE2 are rockedsrabout an ax s to carry the sheet serving means 3fl1forward- 1y to, the position, shown in Figure 11. Asshown in Figures 9 and 11; the lever 36! isxconstructcd with a slotted arm- 220 projecting'rearwardly' from a hub 22f upon. which the lever .ifit pivots. Pivoting of the arm Mil. is. accomplished byaa verticalbar 222 which has a sliding linkageto the arm 22!! at223. Means are providedfor impart:- ing interval movement to the bar 222 by means of a delivery cam 224 secured to the main camshaft [9. As shown in .Figures 4 and 11,. the: delivery cam. 22.4 is provided with a lobe 224a which co.- operates with a roll follower 225'. mounted upon a pin or stud 2%, which in turn is mounted upon a lever 22? pivoted on the flllCIllI'lIlIOd 41. The bar 222 has secured thereto? a return spring 222a which is anchored. on the frame 3 at 2226, see Figure9. At the forward end of the lever"22'l; is mounted a dog 228 whichis hingedly connected ther to at 229...: The do 22%- is formed with anangular'slot 236; the sides of which straddleith'e bar 1222, the latter being held in the slot bya sheet metal plate. 23! secured to the side of the dog 228. The. slot 238 of thedog 228. is slightly widerthan the bar 222 whereby thelattenis permitted to slide freely therein as the levers E51 and i62 are raised with the arins I93."

Means are provided for limitin or varying the amount of pivoting of the levers i6 5 and H52 about the pivot 22! in accordance with the diameter of thecoil beingwound. To accomplish this there is provided means for adjusting the position where the dog zziifmakes engagementwith the 5 bar 222, the position being varied bythe amount the sheet serving mechanism 3% is lifted from the bed 2 by the amount of swing of the arm I95 and the position of a cam which varies the position of 'engagementof the dog ztsion'the bar 222. Asshown in Figure 4, there'is provided a cam 2% which is held between an arm 2M and a collar 2% by means of a bolt fidtwhich supports the cam E ie-between the arm 2M and the collar 252 the cam being secured in position by means of a set screw engaging the bolt 243, the bolt 243 being journaled in the frame H. The arm 245 has a slot 2M therein in which a connector inember 2:35 is adapted to slide as the longitudinal'motion of the member imparts rotation to the P arm The member 2&5 is connect-ed to a rod 245 which is connected to a collar 24"! pivotably mounted on the shaft I153.

It will be remembered that the lifter member 596 is not operable to lift the arms I90 except as the cam E38 has rotatedto causetheengagement of the lifter member i955 with the cam face iii! to lift the arms iiiil and the sheet serving mechanism 39. However, when the arms rec-are lifted to compensate for increasingdi'arneter of the coil being wound the lifting of the arm; ltil will simultaneously lift the rod 2% torotate the cam Immediately the arm Mill -is lifted the lobe 22% of the cam 22% will lift the lever 22?, and will cause the dog 228 pivoted on theend thereof to lift the bar 2532' to pivot the sheet serving mechanism with its measured and severed sheet into position whereby the strand being wound will engage the forward end of the measured and severed sheet. It will be seen that the change of angular position of the cam 2% will change the point at which the dog 228 will engage in the bar 222 thereby varying the amount of swing in the forward 01' sheet serving direction of the sheet serving means 30. By suitable adjustment'of the arbor 5. The strands o i6! and IE2 may be suitably varied. With the cam 2 56 turned to the leftposition, or counterclockwise at the start as seen in Figure 4, the dog 228 will be lifted a small increment each time the levers I90 are lifted a small increment, and the position of engagement of the dog on the bar222 will be lifted to cause the dog 228 to engage the bar at a higher point thereon, so that when the cam lobe 224a lifts the lever 22?, the amount of swing of the levers it! and i552 will be lessened as the coil bein wound increases in diameter.

With the 24s in the position Figure 4, the increment in the amount of lift of the arms I98 will rotate the cam 2 3% further to the right to lower the dog 228, thereby causing it to engage the bar 222 at a lower point, and upon actuation of the lobe 22 5a of the cam 22 i the amount of swing of the sheet serving means Bil will be accordingly increased. According to the thickness of the paper employed and the thickness of the strand being wound, the amount of swing of the sheet serving means mag be suitably varied according to desired operating'conditions.

Means are provided for releasing the measured and severed sheet held between the platen iii and the tension plate H2 as the sheet serving means ailmoves to the sheet serving position to the coil being wound. To this end, the inwardly projecting ledges ltd have secured thereto sheet metal angle the substantial horizontal legs of which are slotted at E5! to receive a pair of fingers 252 which are piivotally connected at 253 to a sheet metal member 25% which held in place on the hub 22! by means of the adjusting screws The end of the finger is adapted to raise with respect to the lei and :62 upon the pivoting thereof about the shaft 563, whereby the end of the fingers 252 are operable to lift the tension plate H2 from the platen i'lil, when the sheet serving means 32 move to the sheet serving position, to insure that the measured and severed sheet is held but loosely in the sheet serving means til when the measured and severed sheet is engaged by the strand being wound. With the foregoing arrangement and with the of extremely thin separation there is no possibility of distorting or tearing or otherwise mishandling the measured and severed sheet which is served to the coil being wound.

The operation of the mechanism thus far described is as follows:

She functioning of the various mechanisms of the machine has already been explained in the description of the co-ope" ting elements, an method of operation of the complete will be explained as it relates to the sequence of operations necessaryto supply insulation or sheet material to the coils being wound.

A supply of wire or strand or strands wound is provided in no shown, in convenient no to be t her in spools underany convenient f the prop" tens" the strand her to a tube position to start A roll of sheet n ateiial, such as very thin cellulose acetate is supplied for delivery to the sheet feeding means, see Figure l, with the for-ward edge 'of the strip drawn from the roll R, first 3 around :the: supply. rollers Zii, and then over the tie rod !3. The strip E3 is then drawn across the plate 26 and entered between the feed rolls 28 and 2%, the upper roll 29 being lifted manually for this purpose. As has been explained, the winding arbor 5 is driven by any convenient power means, and the crosshead 9, which travels axially of the arbor 5 is so arranged that it makes one complete revolution of the cam shaft [9 for a full traverse of the crosshead 9 in either direction. The details of this mechanism are fully described in Le Boeuf Patent No. 2,029,577, referred to previously.

Assuming that the strand to has traversed along the tube 73 mounted on arbor i: by the guides 53, 8, and the latter have very nearly reached their ends of the reciprocating movement, the various mechanism embodied in the paper serving anparatus will assume the position as illustrated in Figures 1, 5, 6 and 9. At this point the delivery of a measured sheet to the coil C taking place, being approximately one-half completed, while the sheet material is being drawn from the roll it by the rollers actuated by the sup ply cam 31. The feed rolls 23 and 29 are inoperative withf'the paper strip therebetween, and a the measuring bar 86 is being raised from its lowermost position under the action of the measuring cam 89. The upper knife E3! has severed the sheet material to form a sheet and is now in raised or inoperative position while the fingers lid are depressed to grip the sheet to the platen iii? of the sheet serving means 3%. The elevation control mechanism has not yet indexed the control cam its around to a suflicient extent to affect the lifting of the heet serving means 33 1 under the action of the elevation cam see especially Figure 5 of the drawings.

As above stated the delivery mechanism is inoperative at this point and the severed sheet of paper is being transferred to the coils. During this sheet transfer operation the sheet releasing mean co-operating with the sheet serving means as is operating to lift the tension plate H2 from the platen H5, see Figures 5, 9 and ll. Meanwhile, the delivery bar 222, see Figure 11, is being raised by the dog 228 which is temporarily connected therewith, the arm 22'! and the dog 228' being moved by the delivery cam 22% in the manner before explained. As the winding operation progresses and the wire guides 8, 3 5. 6.

reach the end of their traverse, the delivery shelf 39 assumes-a position in close proximity to the coil C whereby the forward edge of the measured and severed sheet will be deposited on the upper surface of the coils under the strand to leading thereto, as shown in Figure 11. The forward edge of the sheet is thus caused to be gripped and held by the strand as the traverse of the guides ii, 8 is reversed. Thereafter the rotation of the coils on the mandrel 5 draws the sheet from the delivery shelf 33 it feeds into the coils it supplies a separation layer between the completed layers and strands and the next succeeding strand deposited thereon.

Assuming that the first measured and severed sheet has been transferred to the coils and a new cycle of operation is about to start, the drawing off of the sheet material from the roll R will be considered as the first operation in the cycle. To effect this the rollers 25, see Figures 1 and 12, are moved downwardly under the action of the cam 3'! to draw from the roll R an ample supply of sheet material S. During the descent of the rollers 25 the eccentrically mounted rubber discs 42 act with a wedging effect to bind the sheet material against the rod E3 to prevent it from being drawn back from the plate 26.

After a sufiicient length of sheet material. has been drawn from the roll R, the rollers 25 descend to the position illustrated by the dash lines in Figure 1. During this return movement the feed cam 44, see Figure 2, is rotated to raise the cam follower M to swing the arm at upwardly whereby its pawl 5i acts to rotate the gear 58 through a part of a. complete revolution. Through the gear train 56, 54, .56 and ill, the rolls 28 and 29 are rotated in opposite directions to feed the sheet ,5 therebetween. It will be seen with reference to Figures 2 and 7 that as the sheet S is fed forwardly by the feed rolls 28 and 29 the measuring bar 80 is in raised position and the tension plate H2 is elevated whereby the sheet material will pass thereunder. As will be seen with reference to Figure 7, the measuring bar at is provided with an angle Me, the substantial horizontal leg of which furnishes additional support for the sheet as it is being fed across the platen I'm. As the arm 48 reaches its upper extent of movement its abutment or angular shoulder strikes the contact screw 65 on the lifter member 53, thereby turning the latter on its axis 59. The lug 54 on the member 59 then contacts the adjusting screw 52 in the lug 6! to lift the top roll 29 out of engagement with the lower roll 28 to permit the strip S to be drawn therebetween by the measuring bar Bil.

vImmediately the upper feed roll 29 is raised the measuring operation takes place, and referring to Figure 6, the measuring bar 8% is held in raised position by means of the cam 89. As the cam 89 rotates, the cam follower 88 follows its contour, until the pin H9, upon which the cam follower 83 is supported strikes the gauge finger 99 on the gauge bar 9!. Coincident with the upward movement of the follower 88 the measuring bar is lowered. The tension plate is thus released whereby its associated tension fingers I18 act to grip the sheet against the platen Ht to prevent retrogressive movement thereof. As before explained the measuring bar til has no downward movement at the first traverse of the strand because the gauge linger in is in uppermost position to prevent such movement. However, during progressive traverse, the gauge finger is lowered at a uniform rate to allow the measuring bar to descend to a constantly increasing extent.

As the measuring bar descends it engages the sheet material and drives it downward to form a loop therein, the length of the loop being governed by the diameter of the coils being wound. When winding strands of large diameter, the circumference or perimeter increases rapidly while coils wound of the fine strands increase in size very slowly. For this reason the throw of the control cam 9 5 is adjusted in the manner as before explained so that the indexing of the shaft 93 may be regulated as required.

After the measuring operation is completed the feed rolls actuating mechanism, shown in Figure 2, returns to inoperative position and the top roller 29 is again lowered against the lower roll 28. During this latter movement the upper knife 53! descends to cut the measured sheet to form a measured and severed sheet which is heldon the sheet serving means at! for transfer to the coils. The knife i3! is moved downwardly under the action of the cam use, see Figure 3, which through the link connection I52 rocks the arms 32. The lower sharpened edge of the knife is held against the cutting edge of the stationary knife I38 by means previously described to cause it to act with a-shearing efiect'to severthe; strip Sresting acrossthe' edge of the knife I30; As theoperationis completed the mechanism acts to raise the sheet serving means 3!! ma position to transferthe-sheet tothe coiLC; Referringto'Figure 5, theelevation of'the deliveryshelf 30is liftedby means of theliftercmember- I96 which is raised by the cam I95. Asbefore-explained the lifter member I96 makes-contact with the camface I9! on the arm I9l1toraise the-latterand thereby rock the longer arms: I 64 carrying the-sheet serving means or delivery shelf; 30; When winding the; first few layers of; coils, if a relativelyfinestrand'is beingused" it is not necessary to elevate the delivery shelf 39 since the position of the sheet: is initially adjusted in proper; relation to-the top ofthe coils by means of" the adjusting screws I65a' carried onzthe for- Ward end' of the arms I64. and resting against the top .of the bedrz. After the first few layers of paper have been wound into the coils, the delivery shelf must be periodically raised, to insure that the sheet will properly overlie the top of the coils for the purpose as, before explained. T-he lifter member I96is, therefore, not caused to contactthetcamface, I91 ofthe arm I99. of thefirst few. windings, but asthe coils increase in size thelifter member I96. iseventually movedhintoposition tostrikethe cam. face I9I. As previously explained, this positioning of the lifter member, 1.9.6. je -accomplished by gradually rockingit onflitspivotrpinunder the-actionof the controlcam I98 ,Thecam I98 isrfast upon the shaft .93 carrying-thepinion94 foroperating the measuring gauge finger 99, see Figure 6. As the finger 99.is progressivelyilowered, to compensate for the increaseinsize in coil C, the cam I98 is slowly rotated to rock the lifter member I96 to the right, whereby the deliveryshelf 30 is grad ually lifted- The extent of shifting movement of the lifter member I96 depends upon the size of the strand, being wound, being variable by the adjustment of the index cam 96 for theratchet mechanism shown in Figure 10. This adjust-,- ment also regulates the change in position of the gauge finger, 99. As has been explained with reference to Figures 4 and ,5, the cam face I9I may'also be ad-. justed in position to vary the amount of lift of the sheet serving means 39 depending upon the thickness of the strand being wound and the thickness of the sheet material employed;

Immediately the delivery shelf 3!] has been elevated it is rocked forwardly to transfer the measured and severed sheet to the coil C. As will be seen with reference 'to Figures 5 and 9, the fingers 252 are operating with the forward movement of the delivery shelf 39 to lift the tension bar I12 from contact with the platen I19, and simultaneously lifts the fingers I18 out of contact with the measured" and severed sheet whereby the 'strand' being wound may readily engage the measured'andsevered sheet'without binding. As before explained, the transfer or sheet delivery is effected by means of the cam actuated dog 228, shown in Figure 11, which engages the delivery bar 222. At this poin't in the cycle of operations the delivery cam 224 turns to the position illustrated-in Figure II and the dog 228, having gripped the bar 292; lifts the latter to rock the levers I65 and I62.

It will also be seenwith reference to Figures 4 and 11 that the raising ofithe arms I99'simul taneously liftsrthe rodc246 to rock'the cam 24!] whereby the; position of the dog 2281-: isradjusted 18 with reference to the. delivery bar 222 to vary the amount of swing of the levers IBII' and, IE2 according to the diameter of the coil being wound.

As has been explained previously the delivery operation is very rapid so that the delivery shelf 30 may, be returned to position to receive an additional supply of sheet material to be severed from the strip S; As the-shelf 30 is returned'to its initial position the paper supply mechanism completesthe operation of drawing a supply of sheet material from the roll R-while the measuring bar Bilis raised to allow the-strip to be fed thereunder. The tension fingers I78: are raised simultaneously with the bar 8i] to permit the strip to be fed unto the platen I19, andtheangle connected tothe delivery barBlI provides an-addia tional surface over: which the sheet material may moveand be supported. At' this point the pawl I 08 is actuated by the cam 96, see Figure 10; to index the elevation controlcam- I99 and position the gauge finger 90, whereby to reset the various mechanisms in position to start a new cycle of operations inthemanner explained hereinabove.

The various operations aboveexplained are repeated during the winding of the coils until a, predetermined numberof turns of strand or wire have been wound. Automatically actuated means, not herein shown, then act to arrest the operation-ofthe machine.- The coils may thenbe removed-from the machine with the mandrel 5 and another mandrelplaced in the headstock 4, see Figure 4. After the strands 10 have been at tached to-the mandrel 5 or to the tube t, the

sheet serving apparatusis reset by drawingthe crankhandle 2M forwardly to the position shown in Figure 9. The crank handle ZMisthen caused to actuate-the mechanism before described to reset the'measuringbar 89 andthelifterbar I96 in,-the first position fornwinding another set 0 coils. It will be apparent from the foregoing description that the presentinvention applies sheets for separationr'or insulating material to coils being wound at thecompletion of each layer of Winding. 'Atthe same time providing'means for insuring that the'separation layers may befreely inserted between each layer Without anybinding andwith proper placing of the separation sheet. The sheetserving means operated by the mechanism is also provided with means for vary-- ing the amount of stroke thereof in accordance with the changing of diameter of the coils being wound. The'sheet serving means thus operates with accuracy and precision, properly insert ng the sheets of insulation material into the'coils Without crinkling and skewing, whereby perfectly wound coils are produced;

While the: inventionhas" been descr bed and.

illustrated in a preferred embodiment thereof, it is to be distinctly understoodthat various modifications-maybe made-therein without departing from the spirit orscope of theinvention except as defined in terms of the claims here app-ended.

coil;- means for intervally rai'sing the-sheet serving means prior to its position for delivery. and means co-operating with the first said means for chan ing the sheet delivery position of said sheet serving means in accordance with the increasing diameter of said coil.

2. In a coil winding machine of the type wherein a rotating spindle co-operates with a strand travelling axially of said spindle and wherein sheet serving means intervally inserts a sheet between succes ive layers of a coil being wound upon said spindle; the combination therewith of means for moving said sheet serving means in a curvilinear path into position to deliver a sheet to said coil, reciprocable means for intervally raising the sheet serving means prior to its position for delivery; and means co-operating with the first said means for changing the sheet delivery position of said sheet serv ng means in accordance with the increasing diameter of said coil.

' 3. In a coil winding machine of the type where in a rotating spindle co-operates with a strand travelling axially of said s ndle and wherein sheet serving means intervally inserts a sheet betweensucces ive layers of a coil being wound upon said sp nd e; the combinat on therewith of means for pivoting said sheet serving means about an axis into posit on to deliver a sheet to said coil, means for intervally raising the sheet serving means prior to its os t on for del very. and means co-onerating with the fir t said means for changin the sheet delivery DOsitirm of sa d sh et serving means'in accordance with the increasing diameter of said coil.

4. In a coil winding machine of the tvpe wherein a rotating s indle co-operates with a strand travelling ax a ly of said s indle and wherein sheet serving means intervally inserts a sheet between successive lavers of a coil being wound upon said s ind the combination therewith of means for pivoting sa d sheet serving means about an. ax s into osition to del ver a sheet to said coil, reciprocable means for intervally raising the sheet serving means pr or to its position for delivery, and means co-operating with the first said means for changing the sheet delivery position of said sheet serving means in accordance with the increasin diameter of said coil.

5. In a coil winding machine of the type wherein a rotating s indle co-operates w th a strand travel ing axially ofsaid spindle and wherein sheet serving means intervally in erts a sheet between successive layers of a coil being wound accordance with the increase in diameter of said coil for changing the range of movement of said sheet serving means. i a

6. In a coil winding machine of the type wherein a rotating spindle co-operates with a strand travelling axially of said spindle and wherein sheet serving means intervally inserts a sheet between successive layers of a coil being wound 7 upon sa d spindle; the combination therewith of means for moving said sheet serving means in a curvilinear path into position to deliver a sheet to said coil, reciprocable means for intervally raising the sheet serving means prior to its position for delivery,'autoinatic means for progressively increasing the range of action of said second means in accordance with increase in diameter of said co l, and means co-operating with said second means in accordance with the increase indiameter of said coil for changing the range of movement of said sheet serving means.

'7. In a coil winding machine of the type wherein a rotating spindle co-operates with a strand trave ling axially of said spindle and wherein sheet serving means intervally inserts a sheet between successive layers of a coil being wound upon said spindle; the combination therewith of means for pivot ng said sheet serving means about an axis into position to deliver a sheet to said coil, means for intervally raising the sheet serving means prior to its position for delivery, automatic means for progressively increas ng the range of action of said second means in accordance with increase in diameter of said coil, and meansco-operat ng with said second means in accordance with the increase in d ameter of said coil for changing the range of movement of said sheet serving means.

8. In a coil winding machine of the type wherein a rotating s indle co-operates with a strand travell ng axially of said s indle and wherein sheet serving means intervally inserts a sheet between successive layers of a coil being wound upon said s indle; the combination therewith of means for pivoting said sheet serving means about an axis into osition to deliver a sheet to said coil, reciprocable means for intervally raising the sheet serving means prior to its posit on for delivery, automat c means for progressively increasing the range of act on of sa dsecond means in accordance with increase in diameter of said coil, and means co-operating with said second means in accordance with the increase in diameterpf said coilfor changing the range of movement ofsaid sheet serving means. r f

9. Ina co l winding machine of the type wherein a rotating s indle co-operates with a strand travelling axially of said spindle and wherein sheet serving means intervally inserts a sheet between successive layers of a coil being wound on sa d spindle, means for feeding sheet material to said sheet serv ng means, means for measuring and severing the sheet material fed to said sheet serving means, means for moving said sheet serving means in a curvilinear path into position to deliver a measured and severed sheet to said coil, means for intervally rais ng the sheet serving means prior to its osition for delivery, and means co-o erat ng with the means for raising the sheet serving means in accordance with the increase in diameter of said coil for changing the range of movement of said sheet serving means.

'10. In a coil winding -machine of the type wherein a rotating spindle co-operates with a strand travelling axially of said spindle and wherein sheet serving means intervally inserts a sheet between successive layers of a coil being wound on said spindle, means for feeding sheet material to said sheet serving means, means for measuring and severing the sheet material fed to said sheet serving means, means for pivoting said sheet serving means about an axis into position to deliver a measured and severed sheet to ing the sheet serving means in accordance with the increase in diameter of said coil for changmeans;

11. In a coil winding machine of: the type wherein a rotating spindle co-operates' with a strand travelling axially of said spindle and wherein sheet servingmeans intervally inserts a sheet; between successive layers of a coil being wound on said spindle, means for feeding sheet material to said sheet serving means, means for measuring and severing the sheet material fed to said sheet serving means, means for moving said sheetserving means in a curvilinear path intoposit on to deliver a measured and severed sheet'to saidcoil, reciprocablemeans for inter-: vally raising the sheet serving means prior to its position for delivery, and means co-operating with the means for raising the sheet serving means in accordanceiwith the increase in diam: eter, of said coil for changing the range of move: ment of said sheet serving means.

12. In a coil winding machine of the type wherein a rotating spindle co-operates with a strand travelling axially of said spindle and wherein sheet serving means intervally inserts a sheet between successive layers of a coil being wound on said spindle, means for feeding sheet material to said sheet serving means, means for measuring and severing the sheet material fed to said sheet serving means, means for pivoting saidsheet serving means about an axis into position to deliver a measured and severed sheet to said coil, reciprocable means for intervally raising the sheet serving means prior to its position for delivery, and means co-operating with the means for raising the sheet serving means in accordance with the increase in diameter of said coil for changing the range of movement of said sheet serving means.

13. In a coil winding machine of the type wherein a rotating spindle co-operates with a strand travelling axially of said spindle and wherein sheet serving means intervally inserts a sheet between successive layers of a coil being wound upon said spindle; the combination therewith of means for moving said sheet serving means into position to deliver a sheet to said coil,

means for intervally raising the sheet serving means prior to its position for delivery, means co-operating with the first said means for changing the sheet delivery position of said sheet servingmeans in accordance with the increasing diameter of said coil, and means for releasing the sheet being served prior to the engagement thereof. by the strand being wound.

14. In a coil winding machine of the type wherein a rotating s indle co-operates with a strand travelling axially of said spindle and wherein sheetserving means intervally inserts a sheet between successive layers of a coil being wound upon said spindle; the combination therewith of means for moving said sheet serving means into position to deliver a sheet to said coil, reciprocable means for intervally raising the sheet serving means prior to its po ition for delivery, means co-operating with the first said means for changing the sheet deliveryposition of said sheet serving means in accordance with the increasing diameter of said coil, and means for relea ing the sheet being served prior to the engagement thereof by the strand beingwound.

15. In a coil winding machine of the type wherein a rotating s indle co-onerates with a strand travelling axially of saidspindle and wherein sheet serving'means intervally insertsa sheet-between successive'layersof a coil being 22 wound uponsaid spindle; the combination there! with, of means, for pivoting said sheet serving means about an. axis into position to deliver a sheet to said, coil, means for intervally. raising the sheet serving means prior to its position for delivery, means co-operating with the first said means for changing the sheet delivery position of said sheet, serving means'in acoordance with the increasing diameter of said coil, and means for releasing the sheet being served prioryto the engagement thereof by the strand being wound:

16. In a. coil, winding machine of the: type wherein, a rotating spindle co-operates with a strand travelling axially of said spindle and wherein sheet servingmeans intervally inserts a sheet between successive layers of a coil being wound upon said spindle; the combination there, with of means for pivoting said sheet serving means about an axis into position to deliverga sheet to said coil, reciprocable means for inter, vally raising the sheet serving means prior toits position for delivery, means co-operating with the firstsaid meansfor changing the sheet de-, livery position of said sheet serving means in ac: cordance with the increasing diameter of said coil, and means, for releasing the sheet being served prior to the engagement thereof by the strand being wound.

17. In a coil winding machine of the type wherein a rotating spindle cooperates with a strand travelling axially of said spindle; and wherein sheet serving means intervally'inserts a sheet betweensuccessive layers, of a coil being wound upon said, spindle; the combination there-,- with of means for moving said sheet serving means into position to deliver a sheet to said coil, means for intervally raising the sheet. serve ing means prior to its position for delivery, auto-. matic means for progressively increasing the range of action of said second means in accordance with increase-in diameter of said ,coil, means co-operating with said second means in accordance withthe increase in diameter of said coil, for changing the range of movement of said sheet serving means, and means for releasing the sheet being served prior'to the engagement thereof by the strand being wound.

18. In acoil winding machine of the type wherein a rotating spindle co-operates with a strand. travelling axially of said spindle and wherein sheet. serving means intervally inserts a sheet between successive layers of a coil being wound upon said spindle; the combination there? with, of means for moving said sheet serving means into position to, deliver a sheet to said coil, reciprocable means for intervally raising the sheet serving means prior to its position fordelivery. automatic means for progressively increase ing'the; range of action of said second meansin accordance with increase in diameter of saidcoi-l for changing the range of movement of said sheet serving means. and means for releasing thesheet being served-prior to the engagement thereof by the strand being wound.

19. In a coil winding machine of the type wherein a rotating spindle co-operates with a strand travelling axially of said spindle and wherein sheet serving means intervally inserts a sheet between successive layers of a. coil being wound upon said spindle; the combination ther with of means for pivotingsaid sheet serving means about an into position to deliver a sheet to said coil, means for'intervally raising the sheet servingmeansxpriorto its position for deliverm. automatic means vfor:progressively ini- 

